Five bells begin to toll together and toll respectively at intervals of 6, 5, 7,

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Home Aptitude

Question
Five bells begin to toll together and toll respectively at intervals of 6, 5, 7, 10 and 12 seconds. How many times will they toll together in one hour excluding the one at the start?
Options
A. 7 times
B. 8 times
C. 9 times
D. 11 times

Correct Answer

8 times

Explanation

L.C.M. of 6, 5, 7, 10 and 12 is 420.

So, the bells will toll together after every 420 seconds i.e. 7 minutes.

Now, 7 x 8 = 56 and 7 x 9 = 63.

Thus, in 1-hour (or 60 minutes), the bells will toll together 8 times, excluding the one at the start.

1.
P is related to Dena Bank in the same way as B is releated to PNB based on the given arrangement. Who amongst the following is D related to, following the same pattern?
Options
A. Syndicate Bank
B. Canara Bank
C. Bank of Maharashtra
D. Indian Bank

7. Sundar runs 20 m towards East and turns to right and runs 10 m. Then he turns to the right and runs 9 m. Again he turns to right and runs 5 m. After this he turns to left and runs 12 m and finally he turns to right and 6 m. Now to which direction is Sundar facing?
Options
A. East
B. West
C. North
D. South

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